I tried playing it a few months ago.
I'm a die hard Diablo 2/Torchlight/Morrowind fan and played Eve Online for about 6 years (even tried Anarchy Online years and years ago) so thought I'd give WoW a go.
Well it looked okay and played okay. But I found there was no real way to tweak up my character and alter the stats. Gear was much of a muchness. Combat was just clicking three spell icons over and over till the attacker died. There was little interactive stuff in the surroundings. If you found a building there was nothing you could do with it or objects dotted around. Quests were just rather repetitive.
If you went exploring again you couldn't interact with the surroundings and if you strayed into another area I found that was for higher level players and you just died so that was a no no. So a feeling of being boxed in was all too apparent.
Overall it was just really disappointing from a single player perspective. I got to around level 40 and just walked away. I guess it just wasn't the game for my playing style.